National Oceanic and Atmospheric Administration National Weather Service United States Department of Commerce
Current conditions at

Johnstown - Cambria County Airport (KJST)

Lat: 40.31°NLon: 78.83°WElev: 2274ft.

Partly Cloudy

72°F

22°C

Humidity 79%
Wind Speed W 14 G 23 mph
Barometer 30.01 in (1014.8 mb)
Dewpoint 65°F (18°C)
Visibility 10.00 mi
Last update 14 Oct 2:54 pm EDT
Extended Forecast for

Twin Rocks PA

  • This Afternoon

    This Afternoon: Showers likely and possibly a thunderstorm before 5pm, then a chance of showers and thunderstorms after 5pm. Mostly cloudy, with a high near 74. West wind around 9 mph, with gusts as high as 20 mph. Chance of precipitation is 70%. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.

    High: 74 °F

    Showers
    Likely

  • Tonight

    Tonight: A chance of showers and thunderstorms before 8pm. Mostly cloudy, with a low around 51. North wind around 5 mph becoming calm in the evening. Chance of precipitation is 30%. New precipitation amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.

    Low: 51 °F

    Chance
    Showers then
    Mostly Cloudy

  • Thursday

    Thursday: Partly sunny, with a high near 64. East wind 5 to 7 mph.

    High: 64 °F

    Partly Sunny

  • Thursday Night

    Thursday Night: Showers and thunderstorms likely before 3am, then showers and possibly a thunderstorm between 3am and 5am, then a chance of showers and thunderstorms after 5am. Low around 57. Southeast wind around 9 mph, with gusts as high as 24 mph. Chance of precipitation is 80%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.

    Low: 57 °F

    Chance
    Showers then
    Showers

  • Friday

    Friday: Showers, mainly after 2pm. High near 74. Southwest wind 13 to 16 mph, with gusts as high as 36 mph. Chance of precipitation is 100%. New precipitation amounts between a tenth and quarter of an inch possible.

    High: 74 °F

    Chance
    Showers then
    Showers

  • Friday Night

    Friday Night: Showers before 2am. Low around 38. Chance of precipitation is 80%. New precipitation amounts of less than a tenth of an inch possible.

    Low: 38 °F

    Showers

  • Saturday

    Saturday: Mostly sunny, with a high near 48.

    High: 48 °F

    Mostly Sunny

  • Saturday Night

    Saturday Night: Widespread frost, mainly after 2am. Otherwise, clear, with a low around 30.

    Low: 30 °F

    Frost

  • Sunday

    Sunday: Widespread frost, mainly before 9am. Otherwise, sunny, with a high near 56.

    High: 56 °F

    Frost then
    Sunny

Detailed Forecast

This Afternoon
Showers likely and possibly a thunderstorm before 5pm, then a chance of showers and thunderstorms after 5pm. Mostly cloudy, with a high near 74. West wind around 9 mph, with gusts as high as 20 mph. Chance of precipitation is 70%. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.
Tonight
A chance of showers and thunderstorms before 8pm. Mostly cloudy, with a low around 51. North wind around 5 mph becoming calm in the evening. Chance of precipitation is 30%. New precipitation amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.
Thursday
Partly sunny, with a high near 64. East wind 5 to 7 mph.
Thursday Night
Showers and thunderstorms likely before 3am, then showers and possibly a thunderstorm between 3am and 5am, then a chance of showers and thunderstorms after 5am. Low around 57. Southeast wind around 9 mph, with gusts as high as 24 mph. Chance of precipitation is 80%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.
Friday
Showers, mainly after 2pm. High near 74. Southwest wind 13 to 16 mph, with gusts as high as 36 mph. Chance of precipitation is 100%. New precipitation amounts between a tenth and quarter of an inch possible.
Friday Night
Showers before 2am. Low around 38. Chance of precipitation is 80%. New precipitation amounts of less than a tenth of an inch possible.
Saturday
Mostly sunny, with a high near 48.
Saturday Night
Widespread frost, mainly after 2am. Otherwise, clear, with a low around 30.
Sunday
Widespread frost, mainly before 9am. Otherwise, sunny, with a high near 56.
Sunday Night
Clear, with a low around 35.
Monday
Sunny, with a high near 62.
Monday Night
Partly cloudy, with a low around 40.
Tuesday
Mostly sunny, with a high near 62.
Tuesday Night
Partly cloudy, with a low around 41.
Wednesday
Sunny, with a high near 64.
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ABOUT THIS FORECAST

 
Point Forecast:
Twin Rocks PA
 40.53°N 78.86°W (Elev. 1696 ft)
Last Update:
2:21 pm EDT Oct 14, 2026
Forecast Valid:
3pm EDT Oct 14, 2026-6pm EDT Oct 21, 2026
 
Forecast Discussion
 
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Additional Resources

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Hourly Weather Forecast

National Digital Forecast Database

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High Temperature

National Digital Forecast Database Weather Element Forecast

Chance of Precipitation